# Determine the mass of copper released during electrolysis. The charge passed through the electrolyte

Determine the mass of copper released during electrolysis. The charge passed through the electrolyte is 300 C. The electrochemical equivalent of copper is 0.33 mg / C.

To find out the mass of copper that should have been released during electrolysis, we use the formula (we apply the first Faraday’s law): m = kсu * q.

Const: kсu – electrochemical equivalent of copper (according to the condition, we take kсu = 0.33 mg / C, in SI ksu = 0.33 * 10-6 kg / C).

Data: q – charge passed through the taken electrolyte (q = 300 C).

Let’s perform the calculation: m = kсu * q = 0.33 * 10-6 * 300 = 99 * 10-6 kg = 99 mg.

Answer: During electrolysis, 99 mg of copper should have been released.

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